Submitted Article: CORONADO REALTOR SPONSORS HISTORY-SAVING EXPEDITION Ferryboat San Diego Meets Dramatic End   CORONADO – Like a scene from a low-budget film noir movie, the sky flashed with lightning, rain pelted down on deserted buildings and an old ferryboat pulled at her mooring lines with disappointment.   This was the scene at San Francisco’s Mare Island recently. The former San Diego-Cor…